Bandgap voltage reference circuit with an npn current bypass...

Details Bandgap voltage reference circuit with an npn current bypass... Bandgap voltage reference circuit with an npn current bypass...

G - Physics

05

F

328/199

G05F 3/30 (2006.01)

Patent

CA 1321816

ABSTRACT OF THE DISCLOSURE A temperature compensated bandgap voltage reference circuit employs an npn transistor based bypass circuit to maintain a constant collector current within the reference circuit. This bypass circuit draws a nominal current from the bandgap voltage reference circuit. The value of this current is set by a bias circuit responsive to changes in the supply voltage. As the supply voltage changes, the bias circuit varies, the conductance of a bypass transistor to draw more or less current and thereby maintain the collector current within the reference circuit constant.

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